Cultivator-bla de



(No Model.)

L. D. GAVITT.

CULTIVATOR BLADE No. 282,880. Patented Aug. '7, 1883.

UNITED STATES PATENT OFFICE.

LORENZO D. GAVITT, or Los ANGELES, CALIFORNIA.

cu LTIVATOR-BLADE.

SPECIFICATION forming part of Letters Patent No. 282,880, dated August 7, 1883.

- Application filed February 19, 1883. (do model.)

To all whom it may concern: 7

Be it known that I, LORENZO D. GAVITT, of

the city and county of Los Angeles, State of same to their standards.

The object of my invention is to make the blade adjustable, reversible, and self-sharpening. I attain this obj ectby means of the device represented in the accompanying drawings, in which I A B is the blade and shank. 0 is the standard. D is the pivot-bolt. E is the clutchbolt. F is the slot in the shank of the blade, and F the slot in the standard.

Figure 1 is a perspective view of the device. Fig. 2 is a side elevation, and Fig. 3 is aview of a cultivator provided with my invention.

The blade A is straight and fiat, and in line centrally with its shank B. The slots F and F are semicircularinform, (being arcs of a cir cle of which the pivot D is the center,) and should have a combined length sufficiently great to allow the play necessaryfor the ad justment desired. A combined length of two inches is sufficient for ordinary purposes. These slots may be of difi'erent lengths, and one of them may be dispensed with entirely, if desired, the object in having two slots being to allow a suflicient play without materially increasing the size of the standard or shank. The distance between the pivot and slots may vary also; butlfind about two inches to serve the purpose best for ordinary'use.

The blade is secured to its standard by the pivot-bolt D and clutch-bolt E, which pass through the shank B and standard 0, and are 0 held in place by screw-taps. To adjust the blade the clutch-bolt E is loosened, the blade moved as desired, and the bolt retightened. To reverse the blade the taps are removed and the blade turned over and secured, as before. 5

The bevel on the edge of cultivator-blades should be upon the upper side, so that the blade will enter the soil easily. As the lower side wears away by use the bevel is changed and the blade requires sharpening. By means of my invention, as the blade becomes worn the point may be lowered so that it will enter the soil at a sharper angle, and when it has become beveled upon the under side it may be reversed and the beveled side placed uppermost. Thus, by simply adjusting and reversing the blade as it becomes worn, it may be made to do efficient Work until worn out.

\Vhat I claim, and desire to secure by Letters Patent, is

1. In a cultivator, the straight fiat blade A, with its shank B, pivoted and secured to the slotted support 0, substantially as and for the purpose shown and described.

2. The combination, substantially as shown, of the straight fiat blade A, slotted shank B, slotted standard 0, pivot-bolt D, and clutchbolt E, for the purpose described.

LORENZO D. GAVITT.

\Vitnesses:

JAs. 1%.. TOWNSEND, H. T. HAZARD. 

